I am not a techie and updated to V4.0U (dumb**s, I know). I have installed the Homebrew Channel but I get a 1035error when I try to install IOS16-64... in the 1st part of the downgrade process. I have tried re-downloading and unzipping files in case something was missed. It worked on a V3.4U unit I tried. Do I need something else? Also, I have found when I initially go to AnyRegionChanger I get the following: Identifying as SU...Error! ES_Indentify (ret = -1017) Initializing Filesystem driver...OK! Error! ES_OpenTitlecontent (ret = -1026) I am guessing that before finding your much needed guide, I screwed something up and got a file somewhere it shouldn't be. I have tried deleting the Homebrew Channel and starting again with reformatted SD card.